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Automatic tuning of probe noise for continuous acoustic feedback cancelation in hearing aids

机译：自动调整探头噪声，以连续消除助听器中的声学反馈

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摘要

In this paper, we propose a probe signal-based method for continuous acoustic adaptive feedback cancellation (AFC) in digital hearing aids. The main idea is to incorporate a time varying gain with the probe signal, such that a high level probe noise is injected during the transient state, and a low level probe signal is used after the system has converged. The proposed method is essentially based on two adaptive filters working in tandem. The weights between these two adaptive filters are exchanged by an efficient weight-transfer strategy, such that both adaptive filters give a good estimate of the acoustic feedback path. Simulation results demonstrate that the proposed method achieves good modeling accuracy, preserves good speech quality, and maintains high output SNR at the steady-state.
机译：在本文中，我们提出了一种基于探针信号的数字助听器中连续声自适应反馈消除（AFC）方法。主要思想是将随时间变化的增益与探测信号相结合，以便在瞬态期间注入高电平的探测噪声，并在系统收敛后使用低电平的探测信号。所提出的方法基本上基于两个串联工作的自适应滤波器。这两个自适应滤波器之间的权重通过有效的权重转移策略进行交换，这样两个自适应滤波器都可以很好地估计声反馈路径。仿真结果表明，该方法具有良好的建模精度，可以保持良好的语音质量，并在稳态下保持较高的输出信噪比。

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